Photovoltaic Power Prediction and Evaluation Methods Considering Module Attenuation and Installation Angles
In view of the problems that there are many kinds of installation angles for distributed photovoltaic(PV),and it is difficult to evaluate module performance differences and abnormal conditions under different instal-lation angles,a photovoltaic power prediction and evaluation method is proposed considering module attenuation and different installation angles.Based on the actual operating data of a distributed rooftop PV power station whose module angle is 5°southward inclination,the known horizontal total irradiance is converted into the total ir-radiance of the PV inclined plane by direct dispersion separation method and Hay method,and the applicability of various model algorithms is evaluated considering the correlation between component output and environmental factors as well as module attenuation.The optimal model is selected to predict the power of PV modules with the angle of 5°north inclination,and the highest prediction accuracy can reach 94.94%.This research provides a solu-tion for the performance evaluation of PV modules with complex installation angles,which can effectively reduce the difficulty of data operation and maintenance at the station and improve the performance evaluation accuracy of PV modules under different installation conditions.
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